Synthesis of azasugars as potent inhibitors of glycosidases
作者:Yves Le Merrer、Lydie Poitout、Jean-Claude Depezay、Isabelle Dosbaa、Sabine Geoffroy、Marie-José Foglietti
DOI:10.1016/s0968-0896(96)00266-0
日期:1997.3
A series of enantiomerically pure azasugars (2,5-dideoxy-2, 5-imino-D-mannitol, 1-deoxynojirimycin, 1-deoxymannojirimycin, and related compounds) was synthesized from D-mannitol via aminoheterocyclization of C2-symmetric bis-epoxides and subsequently followed by ring isomerization in few cases. These compounds have been evaluated as inhibitors of several glycosidases (alpha- and beta-D-glucosidases
Synthesis of azasugars. Part 2 isomerization of polyhydroxylated azepanes
作者:Lydie Poitout、Yves Le Merrer、Jean-Claude Depezay
DOI:10.1016/0040-4039(96)00097-4
日期:1996.3
Isomerization of enantiopure C2-symmetric 3,5-dihydroxyazepane derivatives has been studied. The neighboring nitrogen participation occurs during mesylation to give a chloromethylpiperidine, whereas from the a chiral bridged morpholine structure (1R-(6endo, 7exo)-8-oxa-3-azabicyclo[3.2.1]octane-6,7-diol) is obtained under Mitsunobu conditions.
Synthesis of a chiral 2,6-bridged morpholine system: trans-6,7-diol derivatives of 8-oxa-3-azabicyclo[3.2.1]octane
作者:Amuri Kilonda、Elisabeth Dequeker、Frans Compernolle、Pieter Delbeke、Suzanne Toppet、Babady Bila、Georges J. Hoornaert
DOI:10.1016/0040-4020(94)00957-v
日期:1995.1
The title compound 6, [1R-(6endo, 7exo)]-8-oxa-3-azabicyclo[3.2.1]octane-6,7-diol, was derived in nine steps from 1-amino-1-deoxy-D-glucitol 2. The key step was the acid catalyzed rearrangement of epoxide 3 to the 2,5-cis-disposed hydrofuran compound 5. Linkage of the 2,5-substituents, to form the bridged secondary amine 23, proceeded via mesylation of 6-OH and deprotection of 1-NH2. Further O-debenzylation
标题化合物6 [[1R-(6 endo,7 exo)]-8-oxa-3-azabicyclo [3.2.1]辛烷-6,7-二醇经9个步骤衍生自1-amino-1-deoxy -D-葡萄糖醇2。关键步骤是将环氧化物3酸催化重排成2,5-顺式氢呋喃化合物5。2,5-取代基的键合形成桥连的仲胺23,是通过6-OH的甲磺酰化和1-NH 2的脱保护而进行的。进一步的O-去苄基化和(或)N-取代得到氨基二醇6和各种N-烷基化的衍生物。根据1 H NMR分析,将椅子形式分配给桥接的吗啉环。